2. 外语
  3. The invisibility cloak can make something invisible by wrapping ______. What does it mean by "researchers painstakingly tuned t

The invisibility cloak can make something invisible by wrapping ______. What does it mean by "researchers painstakingly tuned t

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问题 The invisibility cloak can make something invisible by wrapping ______.
What does it mean by "researchers painstakingly tuned the design..."?(Para. 5)
选项
答案Researchers adjusted the design with great efforts.
解析 由题干定位到文章第5段第4句To make it work，researchers painstakingly tuned the design of the cloak’s metamaterial parts...tune作动词有“调音”之意，另外还表示“调整(机器等使之运转正常)”，因此可以用adjust来解释。从上下文判断，隐形斗篷不可能一次试验成功，必须付出很多努力反复修改设计使之更好发挥作用，因此应围绕此意回答。
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